India's Director General of Military Operations spoke to his Pakistani counterpart on Wednesday and categorically informed that ceasefire violations and infiltration attempts would "invite appropriate response by the Indian Army."

Lieutenant General Ranbir Singh spoke to Major General Sahir Shamshad Mirza following a Pakistani request for unscheduled talks on hotline in the aftermath of Indian Army's "punitive fire assaults."

"He (Pakistan DGMO) was categorically informed that if any ceasefire violations were initiated by Pakistan troops or any infiltration attempts were made by terrorist from Pakistan Occupied Kashmir or territory under its control, it would invite an appropriate response by the Indian Army," a statement by DGMO's office said.

India Army's shelling killed three Pakistan Army personnel and nine civilians on Wednesday, a day after India promised "heavy retribution" for the death of three soldiers, one of whose body was mutilated. Pakistani soldiers had crossed the Line of Control in Machil sector in Jammu and Kashmir on Tuesday.

Mirza reportedly told Singh about the civilian casualties across the border to which the Lt Gen expressed grief, adding that India attacked locations from where Pakistani shelling had originated. The DGMO also spoke about his concerns regarding civilian casualties in India.

India also raised the issue of infiltration by terrorists and told Pakistan to refrain from nefarious activities. Pakistan also lodged a complaint over the attack on a bus and the subsequent attack on an ambulance that arrived to evacuate the injured.

According to reports, a bus on the Neelam Valley Road in Pakistan-occupied Kashmir's Dudhnial sector was hit. Before the firing by the Indian Army, Pakistan had reportedly opened fire on civilians in Machil, Keran and Gurez, while shells also landed close to Kishanganga Hydroelectric Plant in Bandipore. The workers were forced to seek shelter in tunnels nearby. Also, three villages were hit by shelling from Pakistan, however there were no casualties.

Pakistan's Inter-Services Public Relations (ISPR) said that seven Indian soldiers were killed in retaliatory firing. They also mentioned other incidents where Indian shelling killed civilians in Pakistan, Dawn reported.